Drilling machine structure

ABSTRACT

A drilling machine structure is disclosed, characterized in which handles are arranged on the machine body for holding by the operator with both hands. Between the two handles there are assembled a power motor and a plurality of gear plates with different number of teeth to drive respectively center tip and spiral-shaped rotary blade at the lower part of machine body. The center tip and rotary blade are made of different materials in view of the drilling needs. As such, when drilling a hole, the drilling machine drills with the center tip in alignment with the hole center to guide the varying-speed cutters peripherally arranged at the very bottom of rotary blade to perform real rotary cutting and drilling, and the chips from the cutting are instantly and continuously brought to the surface through a lead hole disposed above each cutter under the driving of rotary blade, thereby achieving smooth drilling in different occasions.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present structure relates to a drilling machine structure that operates in a manner where the operator holds the handles on the machine body with both hands, aligns the center tip of drilling machine with the hole center, and drill to guide the varying-speed cutters peripherally arranged at the very bottom of rotary blade to perform real rotary cutting and drilling, thereby achieving smooth drilling in different occasions.

2. Description of the Related Art

Currently drilling in soil runs into a problem where the driller would continuously and automatically bore downward as the machine is pulled down by gravity. Although the drill bit is able to bore a hole and there are grooves around the bit to remove the drilled soil, the drill bit often gets stuck as it bores down further for the speed of soil removal cannot catch up with the drilling speed. Moreover, as the soil itself is loose and soft, the soil adjacent to the hole bored tends to cave into the hole and “envelop” the drill bit, making it more likely to get stuck. For the same reason that the chip removal speed cannot stay up with the drilling speed, the same problem occurs when drilling in wood, cement, metal or other materials that the deeper the drill bit goes, the more difficult it becomes to remove the chips produced. As the drill bit does the drilling and constantly rubs with the chips that are not removed in time, the drill bit not only gets stuck easily, it is also subject to severe wear and tear, which is far from being ideal. Thus this invention is proposed.

SUMMARY OF THE INVENTION

The primary object of the present invention is to provide a drilling machine structure, characterized in which its body is arranged with handles for holding by the operator with both hands, and between the handles there are assembled a power motor and a plurality of gear plates having different number of teeth, which respectively drives the center tip at the bottom of the machine body and the spiral-shaped rotary blade; when drilling a hole, drill with the center tip in alignment with the hole center to guide the varying-speed cutters peripherally arranged at the very bottom of rotary blade to perform real rotary cutting and drilling. The chips from the drilling will be instantly and continuously brought to the surface through a lead hole above the cutter under the driving of rotary blade, thereby achieving smooth drilling in different occasions.

Another object of the present invention is to provide a drilling machine structure, wherein its center tip and rotary blade are made of different materials in line with the drilling needs.

Yet another object of the present invention is to provide a drilling machine structure, wherein the center tip and rotary blade are respectively driven by the power motor and gear plates with different number of teeth in machine body, and the gear plates may be adjusted to produce varying turning speeds in view of the occasion.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a perspective view of the invention.

FIG. 2A is a side view of the invention.

FIG. 2B is a top view of the invention.

FIG. 3 is a view of the invention with tip touching the drilling surface.

FIG. 4 is a view of the invention in rotary cutting operation.

FIG. 5 is a view of the invention removing the chips.

FIG. 6 is a view of the invention drilling a material (1).

FIG. 7 is a view of the invention drilling another material (2).

FIG. 8 is another embodiment of the invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

Referring to FIG. 1, FIG. 2A, and FIG. 2B, the drilling machine structure of the invention comprises handles 11 arranged in the middle of machine body 1 for holding by the operator with both hands, a power motor 12 and a plurality of gear plates 13 with different number of teeth assembled between the two handles 11 to drive respectively a center tip 2 and spiral-shaped rotary blade 3 disposed at the lower part of machine body 1, the rotary blade 3 being disposed with a plurality of cutters 31 at its very bottom, and a lead hole 32 being disposed at the top of cutter 31. The center tip 2 and rotary blade 3 can be made of different materials suitable for drilling soil A, wood B, cement C, metal and other objects.

When drilling a hole, drill with the center tip 2 in alignment with the hole center (see FIG. 4) to guide the varying-speed cutters 31 peripherally arranged at the very bottom of rotary blade 3 to perform real rotary cutting and drilling (see FIG. 5). When the cutters 31 perform the drilling work, the chips generated from the drilling will be instantly and continuously brought to the surface through a lead hole 32 above the cutter 31 under the driving of rotary blade 3 (see FIG. 6). Because the rotary cut diameter is bigger than the working diameter of center tip 2, while the outer diameter of rotary blade is bigger than the rotary cut diameter of cutter 31, chips generated in the drilling are rapidly and smoothly removed, which prevents the center tip 2 from being enveloped by the chips and getting stuck.

Disregard the object to be drilled, be it soil A, wood B (see FIG. 6), cement C (see FIG. 7) or metal, the present invention offers center tip 2 and rotary blade 3 made of appropriate materials for the occasion, or allows the mounting of center tip 2 and rotary blade 3 on a machine to facilitate the drilling. The present invention can also perform drilling without the gear plates (see FIG. 8). 

1. A drilling machine structure comprising a center tip and a spiral-shaped rotary blade at the lower part of the machine body, a plurality of cutters being disposed at the very bottom of rotary blade, and a lead hole being disposed at the top of each cutter; when drilling a hole, drilling with the center tip in alignment with the hole center to guide the cutters peripherally arranged at the very bottom of rotary blade to perform real rotary cutting and drilling, the chips from the cutting being instantly and continuously brought to the surface through the lead hole disposed above each cutter under the driving of rotary blade, thereby achieving smooth drilling.
 2. A drilling machine structure assembled with a power motor and a plurality of gear plates with different number of teeth inside the machine body for driving respectively the center tip and spiral-shaped rotary blade at the lower part of machine body, wherein the rotary blade being adjustable to produce varying turning speeds in line with actual needs.
 3. A drilling machine structure As claimed in claim 1, wherein a handle is arranged on each side of the machine body for holding by the operator with both hands.
 4. A drilling machine structure as claimed in claim 1, wherein said center tip and rotary blade are made of different materials in view of the drilling needs. 